"The Americans have need of the telephone, but we do not. We have plenty of messenger boys."
Sir William Preece, chief engineer, British Post Office ; 1878
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| Number | Title | Issue Date |
| 4597057 | System for compressed storage of 8-bit ASCII bytes using coded strings of 4 bit nibbles Standard ASCII coded text is divided into alpha, numeric, and punctuation tokens. Each token is converted to a string of four-bit nibbles. One nibble is coded to identify the type of token. Additional nibbles are coded to identify the location, if any, of... | 06/24/1986 |
| 4495566 | Method and means using digital data processing means for locating representations in a stored textual data base The method uses digital data processing means and stored representations of a table of textual block identifiers for locating in a stored textual data base those textual blocks having the best match with a query. Textual block identifiers each provide an ... | 01/22/1985 |
| 4471459 | Digital data processing method and means for word classification by pattern analysis Digital data processing means employing a method for separating acceptable spellings of words from nonacceptable spellings wherein each word comprises characters assigned positions. The character positions in each word are assigned increasing values from ... | 09/11/1984 |
| 4462081 | Signal processing system Apparatus and a related method for generating an estimate of the current state of an information source based upon the observed current and previous states of a related signal and on estimates of the effects of noise. The apparatus includes a state change... | 07/24/1984 |
| 4422158 | Method and means for interrogating a layered data base A method using a digital data processing system and a query composed of entries locates entries in a stored multiple layer data base. The entries have one or more event types, and the entries of the data base include entries which have either an exact or ... | 12/20/1983 |
| 4382277 | Method and means utilizing multiple processing means for determining degree of match between two data arrays Method and apparatus are disclosed for determining a particular criterion value and an associated positional value for the degree of match between the juxtaposition of a plurality of events of a query and a plurality of corresponding events of a stored da... | 05/03/1983 |
| 4290115 | Data processing method and means for determining degree of match between two data arrays Method and means are disclosed for determining a particular criterion value and an associated positional value for a degree of match between the juxtaposition of a plurality of events of a query and a plurality of events of a stored data base entry. The m... | 09/15/1981 |
| 4267568 | Information storage and retrieval system Method and means using order of occurrence of entries and of events within entries for creating a data base and/or for finding a predetermined degree of match between the order of occurrence of events and entries in a request and a stored data base and/or... | 05/12/1981 |
| 4249033 | Vented radio frequency shielded enclosure A ventilated enclosure for shielding electronic equipment from radio frequency energy having a minimum wavelength λ which comprises a metal container forming a fully enclosed volume in which the electronic equipment is mounted. Cooling means, such as a f... | 02/03/1981 |
| 4134077 | Amplifier circuit operable over a wide temperature range An amplifier circuit having stable performance characteristics over a wide temperature range from approximately 0° C up to as high as approximately 500° C, such as might be encountered in a geothermal borehole. The amplifier utilizes ceramic vacuum tube... | 01/09/1979 |
| 4060212 | Deicing apparatus and method A system for effecting the removal of ice from external surfaces of aircraft, and particularly from helicopter rotor blades, by the transmission of microwave electromagnetic energy into the ice so that it functions as a surface waveguide. The system inclu... | 11/29/1977 |
| 4054255 | Microwave ice detector A system for detecting ice on exterior surfaces of aircraft by transmitting a relatively low power microwave electromagnetic signal into a dielectric layer functioning as a surface waveguide, and monitoring the signals transmitted into and reflected from ... | 10/18/1977 |
| 4045814 | Method and apparatus for scrambling and unscrambling communication signals Method and apparatus for scrambling and unscrambling television video and audio signals in a subscription television system in which program selections of subscribers are known at a central transmitting site, and control signals encoded into vertical blan... | 08/30/1977 |
| 4024576 | Method and apparatus for scrambling and unscrambling communication signals Method and apparatus for scrambling and unscrambling television video and audio signals in a subscription television system in which program selections of subscribers are known at a central transmitting site, and control signals encoded into vertical blan... | 05/17/1977 |
| 4019201 | Method and apparatus for scrambling and unscrambling communication signals Method and apparatus for scrambling and unscrambling television video and audio signals in a subscription television system in which program selections of subscribers are known at a central transmitting site, and control signals encoded into vertical blan... | 04/19/1977 |